The largest carnivore to ever walk on terra firma, she preferred fish to dinosaurian flesh and the water to life as a land lubber. On a sadder note, her holotype specimen was destroyed during the night of April 24th, 1944 by a Royal Air Force bombing run on Munich, a solemn reminder that we humans would perhaps much rather prefer to destroy this planet than learn a darn thing about it.

Though Deinocheirus was originally known only from her enormous arms (exceeded in size only by Therizinosaurus), two new skeletal remains (this time more complete) described in 2014 (after being successfully recovered from Mongolian thieves) helped shed some light on this previously enigmatic animal, such as her now-confirmed (at least partial) piscivory, though she remains quite an enigma. Unfortunately, in attaining huge size, she has lost the speed and intelligence of her smaller relatives.

As big as an elephant, this ground sloth was one of the largest land mammals of all time, exceeded in only size by Paraceratherium and some proboscideans. Sadly, she still proved no match for the most dangerous mammal of all: humans.

Originally thought to be a xenarthran mammal until 1891 (hence the grammatically incorrect Greek genus), this giant predatory bird hunted her prey with terrifying speed and rapid dorsal-ventral cuts from her beak and likely serrated mouth and tongue, similar to modern vultures, petrels, and her more famous dinosaurian antecedents such as Allosaurus fragilis.

Originally thought to be a xenarthran mammal until 1891 (hence the grammatically incorrect Greek genus), this giant predatory bird hunted her prey with terrifying speed and rapid dorsal-ventral cuts from her beak and likely serrated mouth and tongue, similar to modern vultures, petrels, and her more famous dinosaurian antecedents such as Allosaurus fragilis.